General discussion

Unable to install MacOS from recovery mode

By evanschrisy935 ·
Tags: Mac
Hello, so I have a 2012 mid MacBook Pro and I’m trying to reinstall Mac OS in it since I upgraded to an ssd. I’m unable to do so in recovery mode(cmd + r) I’ve formatted the drive and selected “Reinstall Mac OS X Lion” but once I’ve accepted the terms and conditions it start to download and then says “couldn’t download addition files” and that happens ever time I try to install it. Any help would be greatly appreciated.

Thank you.
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what is your internet connection?

by yuanyasmine In reply to Unable to install MacOS f ...

Can you boot into internet recovery mode by using Command Option R? When using Command R, what is your internet connection? Wifi or ethernet? https://support.apple.com/en-us/HT201314 This seems to prefer WIFI over ethernet. And WPA2. When in recovery through Command R, you have a help option that opens safari in recovery. You can check the internet connection by doing that. If you have a problem not connecting or lagging, that could be the problem.

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WEP WPA-Enterprise

by aostvv In reply to what is your internet con ...

You cannot reinstall macOS in Recovery Mode if your Mac is connected to a Wi-Fi or Ethernet network that uses the following authentication methods:

WEP
WPA-Enterprise
Certificate-based authentication / 802.1x
Proxies (where specific proxy servers must be configured in network preferences)
Captive Wi-Fi networks (where you click an “Agree” button to access the Internet)
PPPoE (where there is no router handling the PPPoE connection)
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Reinstall MacOS if recovery wont work

by elvisgomes4292 In reply to Unable to install MacOS f ...

Method 1: There are a few reasons why you might find that Command + R doesn't work and your Mac won't start up in Recovery Mode

If command + R not working please follow the below steps
The first thing to try is to restart your Mac and press Command and R again as you boot up.

There are a few other ways you might be able to force your Mac to start up in recovery mode if Command + R isn't working for you.
1. Shift + Option/Alt + Command R (if you are running Sierra 10.12.4 or later) will install the version of macOS that came with your Mac, or the one closest to it that is still available.
2. If your Mac has a T2 chip there may be a simple reason why Command + R isn't working for you. In that case:
Option/Alt + Command + R will install the latest macOS on your Mac if you have a T2 chip.
3. Press Option/Alt + Command + R when you boot up to enter Internet Recovery Mode.

Method 2: You could use Internet Recovery Mode. This method will download a version of macOS from the internet, which might be a solution if you can't access the Recovery partition on your Mac.

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